toán kỳ 2

A. y= $$-\frac{3}{2}$$

x = -3

x = $$-\frac{3}{2}$$

y=-3

A. y= -2x² + 3x -1

B. y= -x² + 3x -1

C. y = 2x² + 3x -1

D. y= -x² - 3x -1

$$-\frac{3}{5}$$

0

{0; $$-\frac{3}{5}$$ }

{0; $$\frac{3}{5}$$ }

A. ( 1;3 )

B. (–∞; 1)∪(3; +∞).

    C. [1; 3].

D. (–∞; 1]∪[4; +∞).

I ( 1; -2 ) ; R= $$\sqrt[]{5}$$

I ( 1; -2 ) ; R = 4

I ( -1; 2 ) ; R =4

I ( 1; -2 ) ; R =2

( x + 1 )² + ( y - 3 )² = 2

( x + 1 )² + ( y - 3 )² = 4

( x - 1 )² + ( y + 3 )² = 4

( x + 1 )² + ( y - 3 )² = 10

u₁ = ( -3;1 )

u₂ = ( 3 ; 1 )

u₁ = ( 1; 2)

u₁ = ( 1; 3)

A. 3x - 4y = 0

B. 4x - 3y = 0

C. 4x + 3y = 0

D. 3x + 4y = 0

30

45

60

135

A. F₁ = ( -25 ; 0 ); F₂ = ( 25 ;0 )

B. F₁ = ( 0; -5 ); F₂ = ( 0 ; 5 )

C. F₁ = (0 ; -56 ); F₂ = ( 0 ; 56)

D. F₁ = ( -5 ; 0 ); F₂ = ( 5 ;0 )